Combined type-writing and computing machine.



W'. WRIGHT. COMBINED TYPE WRITING AND COMPUTING Mama.

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COMBINED TYPE WRITING AND'COMPUTING MACHINE.

. APPLICATION FILED FEB 24. I911- 1,259,700. Patented Mar. 19, 191

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Patented Mar; 19, 1918.

W. WRIGHT. COMBINED TYPE WRITING AND COMPUTING MACHINE.

APPLICATION- FKLED FEB. 24. 1911- Y I Patented Mar. 19, I918.

.... -1 W & M i m w mm m UNITED STATES PATENT OFFICE.

WALTER WRIGHT, OF NEW YORK, N. Y., ASSIGNDR' TO UNDERWOOD. COMPUTING MACHINE COMPANY, OF NEW YORK, N. Y., A CORPORATION 023 NEW YORK.

COMBINED TYPE-WRITING- .AN'D COMPUTING MACHINE.

Specification of Letters Patent.

Patented Mar. 19, 1918.

Application filed February 24, 1911. Serial No. 610,504.

To all whom, it may concern:

Be it known that I, Vii/omen. Wurcn'r, a citizen of the United States, residing in New York, in the county of New York. and State of New York, have inventedc-ertain new and useful. Improvements in Combined Ty e- Zriting and Computing Machines, of which the following is a specification.

This invention relates to computing machines, and particularly those of the class disclosed in pending application No. 5%,603, filed February 12. 11910,. in which an electric motor is connected to drive a key-controlled master wheel adapted to operate SUCCGS? sii'cly the members of a gang of computing wheels; the computing devices. including tens-ranging trains, one for each computing wheel; and a power-rotated shaft, being our ploved to assist the tens-carrying trains.

One of the objects of. the present invenfirm is to improve the means for assisting the tens-carrying trains, particularly with a view to simplifying the mechanism and rendering it more certain, durable and officient.

I provide a power-driven assisting barrel or member which is substantially shorter than the length of the gang oi. computing wheels; whereby the train of tens-carrying mechanism is broken, that is, tens are not Cutlfrflfifl more than say ten or fifteen points o wheels beyond the point at which the master-Wheel is operating, thus. reducing the con'mlicntion, delicacy and expense of the mechanism. The assisting member or barrel operates progressively upon the tcns-carryiug trains in the same manner and at the same time as the ouster-wheel is caused to operate successively upon the computing wheels, and preferably the master-wheel and the assisting member remain in one location while the gang of computing wheels advances step hy stop, being connected for this purpose to the carriage of the typewriter. lfhe invention however is broad enough to include any relative movement. between the gang of computing wheelsand both umstor wheel. and assisting member. "lhe last arranged to operate upon the computing wheel of next higher denominattion from that with which, the master Wheel is in engagement. There may be from thirty o one hundred ormore computing wheels in the gang, while the assisting ban rel may not extend farther-than say fiiteen wheels, so that economy in Q()I1StI-ll6tl0ll,. assembling, adjustment andv operation is of fectecl.

Since, in breaking the tens carrying train at the termination of the aforesaid short assisting member or barrel, there is some liability that a succeeding tens-carr ,ing train may partially operate the Wheel of next higher denomination, I provide means, for automatically restoring said highendenomination. wheel to initial position.

Other objects, and advantages will. herein utter appear.

In the accom-pa-nyin drawings,

Figurel is a side c ovation t an Underwood combined typewriting and computing machine, with the present improvements ap plied thereto- Fig. 2 is a sectional side elevation taken through the computing mechanism and carriage of the ty ewriter.

Fig. 3. is. a root elevation. of the upper right-hand portion of the. machine, showing particularly the computing mechanism; parts being broken away.

F 1g, 4' is an end elevation of the bracket in which the tensrarryin-g assisting barrel is mounted.

Fig. 5 is a. sectional view of the. same.

6 is. a top View of the tens-carrying assisting barrel and its appurtenances.

Fig. 7 is a sectional View of the same.

Power is furnished for rotating the com.- puting wheels by means of an electric motor 1, which may be in constant operation, and may have. a friction clutch 2 to engage a ring 3, which is connected to a pinion 4, meshing withv a pinion 5 on shaft 6, the lat ter carrying a pinion 7 meshing with a pinion 8. Fixed to the pinion 8 is a or pinion 9 meshing with a gear 10-, which is fixed to a primary escapenicnt valuating or index wheel .11. The latter, has pins 12. settable by the numeral keys 13 of the Underwood. typcwriting machine 14. illustrated in the drawings; said-- keys having suitable connections to the pins- 12, as set forth in said application. Said pins 12- turn a-..pi11-- ion. 15,. which is connected to a. secondary escepemeiit Wheel 1.6, which is let. off. stepby-step by means of a pair of dogs. 17, the. latter controlled by muneral keys. 13., as. set forth in said application.

The train of. mechanism extending from the valuatingorindex wheel-11 tothe com? puting wheels includes pinions 10, 9 and 8, a bevel pinion l8 meshing with 8, shaft 19 carrying pinion 18 and also carrying a pinion 20, a pinion 21 meshing with the latter, a vertical shaft 22 carrying the pinion 21, a pinion 23 on the top of said vertical shaft, and a pinion 24 meshing with 28 and secured upon a horizontal shaft 25, on which is fixed a master wheel 26, the latter having teeth 27 to engage the teeth 28 of an internal gear formed upon a computing wheel 29. Said wheel 29 also has external teeth 30 to mesh with a gear 81 formed upon a numberwheel 32. These number wheels are loosely mounted upon a drum or hollow shaft 33. Said drum and both gangs of wheels are mounted in a carriage 34, which is connected by an arm 35 to the carriage 36 of the typewriter; the latter being power-driven and having a letter-feeding mechanism indicated generally as 38, Fig. 1. The gang of computing wheels 29 advances step-by-step with the paper carriage 36, as the latter is fed by the mechanism 38 at the operation of the numeral keys 13.

The ten-carrying mechanism includes aspecial tooth 39 upon each computing wheel 29, for engaging and operating once in each revolution of 29 a five-toothed wheel 40, to rotate or start the rotation of the latter. Fixed to this five-toothed wheel 40 are two other wheels or pinions, one of which, numbered 41, is an ordinary pinion, constantly in mesh with the gear 30 of the computing wheel 29 of next higher denomination, to advance the latter one step at the completion of each revolution of the computing wheel 29 of next lower denomination. Also fixed to the five-toothed wheel 40 is a wheel 42 having five lobes. The recesses 43 between these lobes may be occupied by a detent 44, in the form of a roll pivoted upon an arm 45 pressed by a spring 46, whereby the fivetoothed wheel 40 is held in the proper relation to the wheel 29 and the special tooth 39 thereon. The pinion 41 is half the diameter of gear 30.

It will be observed that each of the lobes of the wheel 42 is formed on its periphery with gear teeth 47 these sets of gear teeth taken together constituting a mutilated gear, of proper diameter to mesh with the teeth of an elongated assisting pinion or barrel 48. This barrel 48 is preferably in constant rotation; and it will be understood that when the special tooth 39 engages the fiveetoothed wheel 40, and starts the latter to rotate, the teeth 47 on one of the lobes of the wheel 42 are thrown into mesh with said revolving assisting barrel 48, and the latter forces the three wheels or members 40, 41 and 42, (which are rigidly connected to one another) to continue their rotation in the same direction, and hence to turn the computing wheel 29 of next higher denomination; the teeth 47' finally rotating out of mesh with the barrel 48, and the movements of the driven parts being completed by the spring detent 44, which falls into the next notch in the lobed wheel 42.

To prevent accident in case the teeth 47 are not presented properly to the teeth of the barrel 48, the latter is preferably provided with yielding bearings as seen for instance in Fig. 5. The barrel runs loosely on a shaft 77 having journals 49, supported in a pair of independently movable blocks or boxes 50, the latter mounted to slide in guides or ways 51, and supported in normal positions by springs 52. These springs permit either block 50 to yield, and hence the barrel 48 may yield at either end or at both ends simultaneously. The guides 51 may be mounted on a bar 53 forming part of the framework of the machine, preferably in clined as seen at Fig. 2, and having on its top and bottom edges grooves 54 formin guides or rails for bars or slides 55, fixed upon the carriage 34; said carriage also having one or more rolls 56 running upon a bottom rail 57.

Said barrel 48, which assists in the described 'manner at the tens-carrying operation, is kept in constant rotation by the electric motor 1, the shaft of which carries a pinion 58 meshing with an idler 59, the latter meshing with a pinion 60, to which is secured a bevel pinion 61, meshing with pinion 52, on shaft 63, the latter carrying a bevel pinion 64 meshing with bevel pinion 65 on vertical shaft- 66, having at its upper end bevel pinion 67 meshing with bevel pinion 68 on horizontal shaft 69. On said shaft 69 is' a spur gear 7 0 to mesh with a pinion 71 fixed to the barrel 48.

The gangs of computing and number wheels 29 and 32, and the carriage 34, may be all of great length, and capable of carrying on several sets of computations concomitantly, there being for instance sixty computing wheels and sixty number wheels, to permit numbers to be added in five or more columns at once, each column running into the millions. The barrel 48 however, it will be noted, is relatively short, for the purpose of preventing tens from being carried past a relatively small number of computing wheels, say ten or fifteen. This greatly simplifies the construction and operation of the machine, and reduces the cost of manufacturing and assembling the parts, and also prevents the machine from being subjected to undue strain and wear. The brevity of the assisting barrel 48 is a special advantage when it is constructed of metal and mounted on yielding bearings, as it avoids the difficulty of mounting in such a manner atens-carrying shaft of great length. Notwithstanding its brevity, the barrel 48 is of ample length for practical purposes, as a computation is seldom carried along for more than ten or twelve Wheels in actual practice.

It will be seen at Fig. 3 that the relation between the master wheel 26 and the assisting barrel 48 is such that said barrel cannot connect with the computing wheel which is being actuated by the master wheel, but it connects to the wheel of next higher denomi nation.

Neither the barrel 48 nor the master wheel travels, in the present instance, with the carriage 36 of the typewriter; but the computing wheel carriage 3st d ces travel with said carriage 36, to present thezcomputing wheels 29 consecutively to the master wheel 26. The barrel 48' maintains a constant relation to the master wheel; and it will be understood that if the computing wheels 29 should remain stationary and the master wheel 26 should be connected to the paper arriage 36 to travel therewith, as explained in certain of my pending applications. the assisting barrel 48 will then be connected to travel step-by-stcp with said master wheel. In other words, the master wheel and the barrel 4-8 taken together may be regarded as one element, and the gangs of computing v. heels may be regarded as another element, and these two elements may travel relatively one to the other, for the purpose of enabling the master Wheel and the assisting barrel 18' to act progressively upon the computing wheels.

It may happen that the last. computing wheel which is at the time actuable by the barrel 48, is caused to complete its entire revolution by the operation of said barrel, and hence the special tooth 39 on such last computing wheel is caused to effect a partial operation of the tens-carrying devices which mesh with the next higher computing wheel, which of course is at this time beyond the range of assisting barrel 48', so that the operation of such higher computing wheel will not be completed, and the corresponding detent 44C may be caused to ride up on the adjacent lobe of the wheel l2 and rest there. I therefore prefer to provide automatic means for returning such higher computing wheel to initial position. This is done by an auxiliary pinion or short barrel 72, which is constantly turning in the opposite direction from t8 and hence, when engaged by the teeth 47 on any five-lobed wheel, will turn or tend to turn the latter baclzwardly to initial position; both barrels -18 and 72 being freely revolubl'e in the recesses 43 between the lobes of the Wheel. 42. In order to avoid accident and to insure proper operation of the parts. the auxiliary re-versingbarrel 72 is not positively connected with its driver, but is connected there-- to by" a friction clutch, of such weakness that undue-opposition is not offered by said reversing barrel 72 to the movement of the five-lobed wheel 42 when the latter is being impelled by the special tooth 39 of the last computing wheel 29'that is Within the range of barrel 4L8.

There is fixed on the shaft 69- a gear 73. meshing with an idler 74:, which drives a pinion 75 concentric with the auxiliary barrel 72-, and connected thereto by a friction clutch 76 of any suitable construction; said barrel 72 being'loosel-y mounted on the nonrotating yielding shaft or arbor 77, upon which the main barrel 4.8 is loosel= rotatable, Fig. 7. When the special toot 3919f the last wheel within the range of the barrel 48 operates the associated tens-carrying train of pinions, the teeth 47 on the latter move into mesh with the auxiliary barrel 72, and because of the employment of the friction clutch 76, said barrel 72 may be stopped and its motion temporarily reversed by said teeth 47, until the active special tooth 39 has pressed the tooth of the fivetoothcd pinion 40 out of its way and escapedtherefrom; whereupon the friction clutch. 76 comes into play to cause the auxiliary reversing barrel 72 to resume its natural movement and return the members 42, 4&1 and 40 to their initial positions, with the detent as seated in a recess 4-3; the number Wheel 29 which is in mesh with the restored pinion 41 being of course also restored to its initial position. Hence the train of tens carrying mechanism is positively broken.

In order to permit the desired yielding movement of the shaft 77 and its journal boxes 50, the teeth of 70, 71,v 7% and: 75' may be made of extra depth as illustrated, to permit relative movement of meshing gears or pinions. The bodily yielding construction of the auxiliary barrel 72 is also an advantage when the latter engages a set of teeth at, as it will tend to prevent accident or abrasion of the parts.

Variations may bev resorted to Within the scope of the invention, and portions of the im rovements may be used without others.

aving thus described my invention, 1 claim:

1. In a computing machine, the combination with a gang of computing Wheels, of trains of tens-carrying devices. a rotating assisting member in proximity to said trains but of less length than said gang, master wheel for'operating said computing Wheels, means for effecting a relative step-by-step movement between said gang of computing wheels and both said 'inastcr wheel and said assisting member, and means for preventing tens from being carried beyond the tennination of said assisting member.

2-. In a computing machine, the combination with a gang of computing wheels. of trains of tens-carrying devices. a rotating assisting member in proximity to said trains but of less length than said gang, a master wheel for operating said computing wheels, means for effecting a relative step by-step movement between said gang of computing wheels and both said master wheel and said assisting member, and a revolving member in position to engage the tens-carrying devices beyond the termination of said assisting member, to reverse the tens-carrying devices and restore their associated computing wheels to initial positions.

3. In a computing machine, the combination with a gang of computing wheels, of trains of tens-carrying devices, a rotating assisting member in proximity to said trains but of less length than said gang, a master wheel for operating said computing wheels, means for eflecting a relative step-by-step movement between said gang of computing Wheels and both said master wheel and said assisting member, a revolving member in position to engage the tens-carrying devices beyond the termination of said assisting member, to reverse the tenscarrying devices and restore their associated computing wheels to initial positions, said reversing member provided with means by which it is revolved, and a yielding connection being provided between said reversing member and said revolving means.

4. In a computing machine, the combination with a gang of computing wheels, of trains of tens-carrying devices, a rotating assisting member in proximity to said trains but of less length than said gang, a master wheel for operating said computing wheels. means for effecting a relative stepby-step movement between said gang of computing wheels and both said master wheel and said assisting member, a revolving member in position to engage the tens-carrying devices beyond the termination of said assisting l'l'] her, to reverse the tens-carrying devices an restore their associated computing wheels to initial positions, said reversing member provided with means by which it is revolved, and a yielding connection being provided between said reversing member and said revolving means, said yielding connection in the form of a slip clutch.

5. In a computing machine, the combination with a gang of computing wheels, of trains of tenscarrying devices, a rotating assisting member in proximity to said trains, but of less length than said gang, a master wheel for operating said computing wheels, means for effecting a relative step-by-step movement between said gang of computing wheels and both said master wheel and said assisting member, a revolving member in position to engage the tens-carrying devices beyond the termination of said assisting member, to reverse the tens-carrying devices and restore their associated computing wheels to initial positions, said reversing member provided with means by which it is revolved; a yielding :onm-ctioi'1 being provided between said roversn'ig member and said revolving means, said yielding connection in the form of a slip clutch, and a single motor connected to both said assisting member and said reversing n'ici'nber.

67 In a combined typewriting and computing machine, the combination of a typewriter carriagc, a set of keys, a constantly running motor, ':nm}'iuting devices controlled by said keys and driven by said motor, and including a gang of computing wheels and a key-controlled master wheel therefor, trains of tens-carrying devices, a shaft connected to said motor and mounted in yielding bearings, a toothed assisting barrel on said shaft in proximity to said Unis-carrying trains. each train including a member movable at the i'enscarrying operation into mesh with said barrel, to be driven thereby, said barrel of less length than said gang of computing wheels. and placed to cooperate with the wheel of next higher denomination from that engaged by the master wheel, and means connected to said carriage'for moving the gang of computing wheels step-by-step relatively to the master wheel and to said assisting barrel.

'7. In a combined typewriting and computing machine, the combination of a typewriter carriage, a set of keys, constantly running ni'otor, computing devices conrolled bv s aid keys and driven by said motor, and including a gang of computing wheels, and a key-controlled master wheel therefor, trans of tens'carrying devices, a shaft connected to said motor and mounted in yielding bearings, a toothed assisting barrel on said shaft in proximity to said tenscarrying trains, each train including a membe movable at the tens-carrying operation into mesh with said barrel, to be driven thereby, said barrel of: less length than said gang oi" computing wheels, and placed to co operate with the wheel of next higher denomination from that engaged by the master wheel, means connected to said carriage for moving the of computing wheels stepby-step relatively to the master wheel and to said assisting barrel, a reverse or back gear loosely mounted and in alinement with said assisting barrel, a train of drive gears for said reverse gear or barrel, and a slip clutch between said train of gearing and said reverse gear or barrel.

8. In a combined typewriting and computing machine, the combination of a typewriter carriage, a set of keys, a constantly running motor, computin devices controlled by said keys and driven y said motor, and including a gang of computing wheels, and a. key-controlled master wheel therefor, trains of tens-carrying devices, a shaftcon e ected to motor and moonte'cl in yieldflll l g hear ngs, a tO QthBCl iXSSIS 111g lbarrel on with the wheellof exthigh 1 from 111M; l engaged by 131i master 1 Wheel,

means connected to eaitl loa rlage gifor movstepmelatiiigly co lthekmaseeipWheel andllto said assisti gherrel, 1a ererier selor back lgear loo-eely mounted and in aline nenh with said a seietmg barrel, a "train of (iI'1 VB ga1S for said reverse 1 gear n 1 barrel; a Slip Clutch bebarrel is eonnectecl fire said motor; :saidmegear or barrel, a shaft upon which are mom ltecl eaidharrel and; sai cl jireverse 1 gear, pinionbeing fixed to said barrel and form ilig partofa train of gearing Wherebythe Verse geaiybeing loosely mounted lo n said shaft, a pinion beiliglmo mtecl looneentrieally with said rereree gear midfield barrel, and. I connected by ael pelutchlto said reverse gear fancl also forniir gjpar 'p of "trainl of gearing whereby @SfllCl reverse gear is lclrlvell constantly in hthe opgmssiteqtlirectioo from said bZhI'I'Ql-yjf l 1 l 9. a com inedrtypewriti rg and Comput ing machine, ;the oombinahilon of a lype writer marriage, a l-set of} keys, a constantly mneingmotor, computing devices eontrolld by said keys and drivenl hy said;motor, and

including a; ang of computing Wheels and a keywcootrollecl master Wheel utherefor trains ings, a toothed lassistingl barrel on said shaft to said motor and mounted ll n Iyielcling bear- 111 proximity mto saicl tensl-earrying trains, each tra n vinolulcling a ymember movable at the tens-carrying operation ainto \inesh with saldlharrel to bedrnten lthereby, said barrel of lessileogth than sa d gangeof CQI I IPHUII g Wheels, and placed towcooperate witlr the wheelflof next higher wclenom-inat ion Efrem that engaged by the masher EV-11661, means onnected 11 lsalcl earrlage for moving the gang of oo llputihg wheel st e p lq'y-e tep rela tlrelyqto thelmaster wheeland to salcl aes lsqling barrel, a reverse lor baek gear loosely IITLOLHIEGEL and in lalinement with said assistw ll-5 5 lbeingl fixeelrlzo said barrel and lthe barrel is ing loosely lmounteel ion -saiclehaft pinion being mounted concentrically with lsaicl freveneelgear ifiIlClvSaid barrel, and oonneeted lby er om ination a slip}; clutch" to {said reverse 1 fgear, and also ior ming part of train of gearing whereby said r *erse gear is driven constantly ie-the op} site lclirection from said harreljflsaid by said keys anddri en by sald otorgend 1 includi g a gangofeomp tiiig m eels and a keyeontrolled master exl heelwthei for traine oi": IQllS-Cfllfljill g wewice ehafl ,co meeted lzoeaic motor and ia'roijmteel inlgyielding bear- I i gs, a toothed ae ietiligl barrel onzeaicl shaft esh d; arrel fof less le gth than; eoicl gaogof computing e5 l Wheele enal plaoecl t o Cooperate with Jrhe wheeler nextl il igher \lcleno nation from e that ei g'agedl by the lmaseerjwheel, means eonneeted ltomsaicll carriage for mooring Allie gang of computing wheels ete mbyetep rela- 9 0 'eljqtorhemaleter wheeljancl to eaidessish l barrel, reverse mead; gear loosely Q i moulnteclancl1in lalinement withsaiflaesist filing barrel, a traihfloflelriveglgearsfor eaicl 1 g gealrgor barrel aelipolultehbetwe ll e5 ealel trainof gearing and eaiclprererselgear e f-barrel, a ehaf'oupon lliCllarmhflflullfifitl fiwiellaarrol and solid m,Verseligeor a pinion being fixed to said barrel and fomninglpart of train ergo "11g "flfilllll ectd ghfl eeei limo- L01 eaicl irerverse gear being loosely mounted on shaft ipiir ien being mount-eel eoi eenfiriolly 'a us l i gear we 1 eaigl vlvarrel, w and looonectesil em slipoluioh'toeaicl rererselgeal micl also 5 forminggpal of a tra ner": gearin hereby ,soi cl reverse gear driven coma Fil y iii the opposite direction from eaicl barrel; ageounl-k ter-shaffb being,ggroriclecl having one ggear in mesh witl'rt he firsteiientio mc an idle ge'ar dri l ng second gear on said oounter ehafit 1 by th e {Met-mentioned 311 0 Ill. 1 In 1 a computingmachiii rthe combine ltioimritlra computing Wheelflof; carryover lm 'l eel: constantly; in lhieshfw th illliiLCijOllllllg n \qomparitiag wheel, tooth on said gfirst loom liming :Wheel; arranged e0 11 Shrike W said carryzorer *heel i130 move it la eoestantl Wheel a rangedlto continue the saidean rorer wheel holly computing Wi1f!],,lfll1d res' leIl tjflll l'li als Sjupporting;saidconstantly;rotating wheel. I; l 12. In a zeon'iputiiigfmaehine the eomhinae mien with a pang of eon putin wheelzs of a l ihaft"beingmountedon yieldinghearings. 1 70 iii; proximity tomsaidl ensmarryijigltra neyfl w herehgylthe barrel is 1 hinwmaod 1 r join ng r20 carryoverwheelwforeach of said wheels eon stantly rota-ting wheel extending along a limitednumber of said carry-over wheels, arranged to engage with each carry-over wheel after it is moved by its computing wheel, and before it is arrested by its detent, to rotate the adjoining computing wheel by it, and a second constantly rotating wheel arranged to rotate oppositely to said first rotating member to return any computing wheel to normal position. v

13. In a computing mechanism, the combination with a computing wheel of a carryover wheel constantly in mesh with an adjoining computingwheel, a tooth'on said first computing wheel arranged to strike said carry-over wheel to move it, a constantly rotating wheel arranged to complete the motion of said carryover wheel, a movable journal supporting said constantly rotating wheel, and a spring arranged to press said journal toward said carry-over wheel.

14. In a computing machine, the combination with a gang of computing wheels and numeral keys, of trains of tens-carrying devices, a rotating assisting member in prox- ,imity to said trains but of less length than said gang, a master wheel for operating said wheels adapted to be driven by said gear wheels.

16. Ina computing machine, the combination with a computing wheel, numeral keys and power means for rotating'said computing wheel to an extent determined by said keys, of a carry-over wheel constantly in mesh with an adjoining computing wheel, a tooth on said first computing wheel arranged to strike said carry-over wheel to move it, a constantly rotating wheel arranged to continue the motion of said carry-over wheel to turn said adjoining computing wheel, and resilient journals supporting said constantly rotating wheel.

' 17. In acomputing machine, the come bination with a computing wheel, numeral keys and power -means1 for rotating said computing wheel to an extent determined by said keys, of a 'carrj over wheel constantly in mesh with an adjoining computing wheel, a lobe on said'carry-over wheel, the latter carrying a tooth arranged to be struck by a tooth on said first computing wheel, and a constantly rotating gear arranged to mesh with teeth on a lobe on said. carry-over wheel and to continue the motion of said carry-over wheel to turn said ad joining computing wheel.

18. In a computing machine, the combination with a computing wheel, numeral keys-and power means for rotating said computing wheel to an extent determined by said keys, of'a carry-over wheel constantly in mesh with'an adjoining computing wheel, a tooth on said first computing wheel'arranged to strike said carry-over wheel to move it, a detent normally holding said carry-over wheel against motion, a coir stantly rotating gear arranged to mesh with said carryover wheel before it is arrested by said detent and to turn it to turn said adjoining computing wheel, and resilientjournals supporting said constantly rotatmg gear. I

19. In a computing machine, the combination with a gang of computing wheels and numeral keys, of trains of tens-carrying devices, a rotating assisting member in proximity to said trains, a master wheel for operating said computing wheels, means for efl'ecting a relative step-by-step movement between said gang of computing wheels and both said master member and said rotating assisting member, teeth on said assisting member adaptedto engage said carry-over trains when said trains are made eflective by" their computing wheels, and resilient journals in which said rotating assisting member is journaled.

20. The combination with a gang of-computing wheels, ofa short assisting member for the tens-carrying trains and breaking the tens-carrying train at the termination of said assisting member, and means for automatically restoring the higher denomination wheel to initial position after the same is partially operated.

'21. The combination with a series of computing wheels variably divisible into groups, and carry-over devices normally ex tending from one group to the next, each group corresponding to a computing unit or totalizer, of carry-over mechanism for said computing wheels including said devices and an assisting member having a capacity limited to a single group of said computing wheels, and means for positively preventing the action of said assisting member on a computing wheel outside of the group served by said assisting member.

, 22. The combination with a series of computing wheels variably divisible into a plura'lity-of groups, each group corresponding to a single computingunit or totalizer, of tens-carrying mechanism for said computing wheels including individual carry-over trains for each computing wheel and connecting each Wheel to both its adjoining nullifying the carryover action of a carry; over train from one computing Wheel in. the

Wheels, an assisting member common to all of the carry-over trains of a single computing unlt or group, and positive means for group served by said assisting member to the next higher computing Wheel outside of the group served by said assisting member.

23. The combination with computing Wheels and carry-over devices therefor, of an assisting member for driving said carry over devices turning in one direction, and anauxiliary member turning in the oppo site direction to said assisting member to eliminate an undesired action due to said asssting member. p 2 1-. a The comblnat on an assisting member for drivingsaid Carr over devices turnmg in one directlon, an

auxiliary member turninglin the opposite directionto said assisting me1nber,to eliminate an undesired action due to said assist ling member, and a slip clutch for sa1daux1l iary member. i it In a computing machine, the combination with an idle shaft supportedin resilient bearings,of two gear Wheels rotating inop-fi posite directions, and supported on said A shaft, computing Wheels, carryover Wheels forsaid computing Wheels, mutilated gears; fast on said carry-overivheels and adaptedf to be driven by said gearkwheels, a motor for driving said gear heels, a positive Copies of this patent may beobtaihed for with computing Wheels and carry-over devicestherefor, of

the assisting computing Wheel, to initiatethe movement engaged by a driving part on its associated of the train, and further comprising a mu:

tilated pinion for meshing with the teeth of said assisting pinion. it 1 i 27. The combination witha series of computing wheelsand carry-over trains therefor,

of an assisting device in the form of ahar rel pinionjuniversalto said trains each train comprising a pinion meshing with the computing Wheel of next higher denomination,

and also comprising amember to :be engaged by a driv ng part onits associated computing heeLt-o initiate the movement of the a Y i train, and further comprising a mutilated pinion for meshing With the teeth of said assisting pinion, provision being made for relative yielding movement between the assistingpinion and the mutilated pinion.

28. The combination with a setof com puting Wheels and trains of carry-over d8", V1CGS therefor, including a set of plmons, of itlItlSSlStlIlg p nion universal to said pinions tomesh with one orrmore thereof the carry-over operation, and supporting means for said assisting fpiniongsaid supporting means being displaceable to accommodate pinion to the ca'rryover pin-1 ions. H 1 29. The combination with computing keys, a gang of computing Wheels and carry-over trains therefor, of an assisting device effective at the key-strokes and common to all the carryover trainsand normally out of engagement therewith, and means oneach computmgflwheel to 11111313138 the movement of ts associated carry-overtram, to engage the same with said assisting device, the latter havingmeansfor interlocking Withthe it carryover i o ve and positively control the same, i i a a a i Witnessesi PAUL ZIRQN, F; D. AMMEN,

WA TER "winner-1T1 E five cents each, by add 'essing the 1 Commissioner Patents.

Washingtomhfl, l i i 

